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Director / Editor: Victor Teboul, Ph.D.
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Independent and neutral with regard to all political and religious orientations, Tolerance.ca® aims to promote awareness of the major democratic principles on which tolerance is based.

When did the first fish live on Earth – and how do scientists figure out the timing?

By Isaac Skromne, Assistant Professor of Biology, University of Richmond
A biologist explains how researchers nail down the age of ancient fossils thanks to a physical process called radioactive decay.The Conversation


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